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0
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1answer
98 views

Rp_filter and linux tunneling

Can someone please explain with an example why reverse path filtering need to be disabled while using IPIP/GRE tunneling? echo 0 > /proc/sys/net/ipv4/conf/all/rp_filter
-2
votes
1answer
534 views

How to make a tun interface with ifconfig in OSX? [closed]

If I try to do this I get the following: bash-3.2# ifconfig tun0 10.140.1.40 ifconfig: ioctl (SIOCAIFADDR): Destination address required It sounds like this doesn't happen in Linux (probably this ...
3
votes
1answer
99 views

secure connections between vps servers

I have four VPS servers. Two of them are replicated glusterfs server and the other two are glusterfs clients. What I want to do is to encrypt all communications between glusterfs servers and between ...
4
votes
2answers
508 views

How to link multiple SSH tunnels together in Linux

I have the following situation: A -----|------ B -----|------ Work Work can SSH into B, and A can SSH into B, but apart from that everything is firewalled. What I would like to do is in effect ...
1
vote
1answer
408 views

Ssh socks server doesn't work [closed]

I want setup socks server on my localhost which forward all http traffic on my remote server for bypass firewall rules at my work net. And so I start it as usually sudo ssh -C2qTnN -D localhost:8080 ...
3
votes
2answers
209 views

IPv6 tunnel broker setup

I'm working on a solution to allow remote Linux nodes that are behind firewalls to be accessible for SSH and web server. Can anyone suggest an IPv6 tunnel scheme that would work with NAT firewalls? ...
1
vote
1answer
3k views

Trouble with site-to-site OpenVPN & pfSense not passing traffic

I'm trying to get an OpenVPN tunnel going on pfSense 1.2.3-RELEASE running on embedded routers. I have a local LAN 10.34.43.0/254. The remote LAN is 10.200.1.0/24. The local pfSense is configured as ...
2
votes
1answer
2k views

IPsec tunnel to Android device not created even though there is an IKE SA

I'm trying to configure a VPN tunnel between an Android device running 4.1 and a Fedora 17 Linux box running strongSwan 5.0. The device reports that it is connected and strongSwan statusall returns ...
0
votes
0answers
347 views

Reverse SSH tunnelling for browsing the internet on a distant server without internet connection

I need to connect myself (Mac OSX) through SSH on a distant server (Unix also) which has no internet access. I would like to browse the internet on the server (updates and other stuffes), so I've made ...
0
votes
0answers
400 views

Reverse tunnelling with “stunnel” in linux

Scenario: Central Log-Server(say logserv)- only private IP interfaces Multiple client servers (logclient)- has public IPs. Requirement: Need to tcp logs of syslog application from logclient to ...
3
votes
1answer
1k views

What is the purpose of netcat's “-w timeout” option when ssh tunneling?

I am in the exact same situation as the person who posted another question, I am trying to tunnel ssh connections through a gateway server instead of having to ssh into the gateway and manually ssh ...
0
votes
1answer
605 views

Which software could I use to setup a 4in6 IP tunnel (RFC 2473) on GNU/Linux

Here is my problem. I have a server A that has two IP addresses. One public IPv4 and one IPv6. Server B has only one IPv6 address. I want to host most of my services on server B (because I have more ...
0
votes
1answer
3k views

How to share internet over VPN and inside a virtual machine (Windows)?

` My final goal is to have a virtual machine at work in which anything that happen inside (tcp, udp, ping, ...) will use the Internet connection of a computer at home. So, if inside this VM should I ...
2
votes
1answer
151 views

How to silently buffer tunnel traffic on network split, and automatically renew the connection when possible?

I have a slow connection between two machines, one in Germany and another in China. Connection sometimes breaks apart, and the packet loss is about 5%, at times even reaching 20%. Chinese machine has ...
1
vote
2answers
608 views

Tunnel an SSH connection transparently (no ProxyCommand)

Here's the scenario: the user runs "ssh -i sshkey user@server1". I want the SSH connection to be tunneled through server1 to server2. Normally, the user could do this himself using: ssh -i sshkey ...
1
vote
1answer
271 views

IP Tunneling for SMTP server on Windows 2008?

I have a Windows 2008 server that is running an SMTP server. The server has a public IP Address. I have 2 other windows servers, not in the same network, that are used for hosting client applications. ...
0
votes
2answers
56 views

Will Tunneling help in this scenario?

I have a computer running 24 hours at a site protecteed by firewall, this computer call it 'A' can connect to internet but unable to host a site since the port is blocked. I have an idea to purchase ...
0
votes
1answer
363 views

OpenVPN - Client connected to server, but not tunneling

For context, I am migrating my VPN server. I duplicated the old set up almost exactly, and now clients connected to the new VPN server cannot tunnel properly (but they connect just fine). While ...
1
vote
1answer
107 views

Am I obliged to use ipv6 tunnel services if I want to be able to use it?

I was looking for configuring Slackware to use ipv6 but all instruction I found speak about using an ipv6 tunnel that encapsulate ipv6 request into ipv4 packet and send them to an external router that ...
2
votes
1answer
111 views

Create a tunnel to my dedicated windows server

I have a Win 2008 dedicated server. The remote access for MSSQL db is disabled. However I want to connect to it during development from my system. I need to create something like a tunnel from my lap ...
1
vote
1answer
61 views

Info on SSH tunelling etc in certain context

Im an electronics engineer, with very little knowledge of networking and assoc. terminology I recently got a Lantronix XPort Pro for use in a project I am working on but have little to no knowledge ...
-1
votes
2answers
459 views

Multiple authoritative DNS server on same IPv4 address

I'd like to maintain a DNS tunnel on my self-hosted server at example.com. I also have a DNS server on it, which serves everything for example.com. I'm currently using dns2tcp for DNS tunneling, on ...
1
vote
1answer
95 views

Secure tunneling options between datacenters

My setup is main website server in one datacenter and mirrors in multiple other datacenters. I'd like to know what are my options to transfer traffic secure and stable between servers? Ssh tunneling ...
9
votes
1answer
2k views

mosh tunnel via proxy

I'm a growing fan of mosh and am increasingly using it when I have unreliable wifi links. What I am trying to figure out is how to build a tunnel through a server which is in a DMZ (connected to ...
0
votes
1answer
297 views

Using OpenLDAP's meta backend to map incoming user to someone else

I am attempting to set up an LDAP "tunnel" to work around an application that requires a configuration slightly different to my environment. I need to be able to bind as USER1 to an LDAP server & ...
0
votes
3answers
2k views

Keeping an SSH Tunnel open, and running a remote command

A computer behind a firewall (at a remote location) connects to my server to open a tunnel... the intention is that from the server I can connect to the computer over SSH. The computer makes the ...
1
vote
1answer
329 views

VPN, Tunneling to hide 'real IP' through my proxy server while showing the client IP on 'real' server side

I would like to hide my 'main server' behind the load balancer, call it 'proxy server' Although I use some closed-source software on 'main server' and it needs the client IP address to operate well. ...
1
vote
1answer
95 views

Bizarre client IP switch-up on VPN

Let A.B.C.D be the public IP of my VPN server. Let W.X.Y.Z be the IP of the client before it connects to the VPN. My VPN server's IP address on the LAN in 10.8.0.1, and the client is 10.8.0.6. I ...
0
votes
1answer
49 views

How Tunneling can be configured or set up in this scenario

I have a scenario like there are two servers 1.On the first server where apache and tomcat are running on different ports.For eg ip would be 172.168.2.19 2.There is a second server where jboss and ...
3
votes
3answers
148 views

SSH port forwarding through Windows machine

is it possible to connect to an SSH server only accessible from inside a network, using a Windows machine without SSH as a gateway?. Let me clarify my question with a sketch: Me (Linux machine)---> ...
2
votes
3answers
153 views

Securely connect to mainframe from cloud

I will preface this by saying that I am a solution architect, and I have a client who wishes to host an app in the cloud. The app needs to access information from SAP and other systems. What is the ...
0
votes
0answers
1k views

IPsec VPN tunnel between Windows 2008 R2 and CISCO ASA?

I need to create a VPN IPsec tunnel between my Windows 2008 R2 server and a CISCO ASA device. I want my server to be both the end of the tunnel, and the server that connects to the other side (no ...
2
votes
1answer
503 views

portforward ec2 instance to localhost for rails development

I'm trying to work with facebooks real-time updates but I'm having trouble giving facebook a callback address that they can use. My dev machine is behind a firewall so I want to use an ec2 instance to ...
0
votes
1answer
981 views

using a gre tunnel as default route

I have two private networks (A, B) that connects via another company's private network (C). Network A has internet access. I want to make a tunnel between B and A that goes through C. Then network B ...
0
votes
1answer
116 views

Obtaining and routing small IPv4 space?

I had an idea for designing a network setup in order to acquire high availability connections to my (small) network, but I seem to be running into a few problems trying to find out the particulars. ...
0
votes
1answer
835 views

What's the difference between GRE and IPIP tunnel?

And which one is better for connecting two linux machines?
0
votes
2answers
109 views

how to “connect ipv6 client to ipv4 only server”

I have a linux server that supports only ipv4 and an IPv6 client. How should I use tunneling or NAT to get the connectivity done from ipv6 client to the ipv4 server? Client is a softphone that sends ...
1
vote
2answers
597 views

Https tunnel for carrying TCP and UDP packets

I had an issue with running Openvpn over UDP in my college network. The firewall was dropping UDP connections. As http and https were working fine and assuming that the firewall was inspecting packet ...
1
vote
1answer
271 views

How do I create an ipip tunnel between two hosts on a LAN?

I have two hosts on a LAN. Both hosts have static IPv4 addresses. Host1: eth0: 112.92.0.1 Host2: eth0: 112.92.0.3 I now want to create an ipip tunnel between these two hosts such that any packet ...
0
votes
0answers
311 views

route all internet traffic via a virtual tap device and a public server on windows [duplicate]

We want to route all traffic from one pc to a local virtual device (TAP-Win32 Adapter which is also used by OpenVPN) and then from there to another tap device on a public server. after that all ...
0
votes
0answers
480 views

How to route all internet traffic via a virtual tap device and a public server

We want to route all traffic from one pc to a local virtual device (TAP-Win32 Adapter which is also used by OpenVPN) and then from there to another tap device on a public server. after that all ...
2
votes
2answers
596 views

Ethernet over IP

I need to merge two L2 broadcast domain into single domain and I have to do this over unmanaged by me L3 IP network. All that I could find is vtun utility for linux. Which software&howto you can ...
3
votes
1answer
2k views

SSH VPN tunnel without having to enable root

ive been trying to setup a VPN SSH tunnel and ive had success executing ssh -Nv -w 0:0 root@192.168.2.2 -p 50 however what i am wondering is, can i do the tunneling without having root unlocked ...
3
votes
3answers
3k views

How to assign a hostname to SSH tunnel

I'm using ssh root@my.server.ip -g -L 4321:localhost:28017 to establish a tunnel from my MacBook to my dedicated server at my hosting provider. It works well. Now I want to access several admin sites ...
1
vote
1answer
170 views

Connect with sftp client to server that can be accessed only through other server

I am new to this forum and to this kind of stuff so don't judge me hard: I would like to connect with: sftp client (Bitise Tunneler) and nxClient (NOMACHINE) to the server A through other server B. ...
0
votes
3answers
775 views

Secure tunnel between two Windows Server 2008 R2 hosts

I'm looking for a way to set up a secure tunnel for HTTP traffic between two hosts on separate networks/domains over a single port. The caveat is that I have no control over the physical aspects of ...
3
votes
1answer
472 views

Renting a IPv4 address block [closed]

I am building a lab network with about 10 virtual routers and 20 host machines (also virtualized) as a part of a school project. The aim is to demonstrate a wide range of IPv6 routing, deployment and ...
1
vote
3answers
312 views

“Tunnel” from one network to another

I'm sure the answer to this would be available on Google but I don't really know what I'm Google-ing for. Situation; We have two networks; our own internal network (192.168.0.[0-255]) and our ...
5
votes
2answers
5k views

SSH tunnel over multi hops using putty

I have a situation where I want to connect to a Linux machine running VNC (lets call it VNCServer) which is behind two consecutive Linux machines i.e., to ssh into the VNCServer, I have to ssh into ...
0
votes
0answers
429 views

Static routes propagation under rip and gre tunnel

I have two questions. The first one regards static routes propagation under rip. I have a router that use RIP for routes and a server connected at this router by two interfaces. I want to propagate ...